#include<bits/stdc++.h>
using namespace std;
int n,sum;
int a[100010];
int main(){
	freopen("color.in","r",stdin);
	freopen("color.out","w",stdout);
	scanf("%d",&n);
	for(int i=1;i<=n;i++)
		scanf("%d",&a[i]);
	sort(a+1,a+n+1);
	for(int i=1;i<=n;i++)
		if(a[i]!=a[i-1])sum++;
	printf("%d",n-sum-1);
	return 0;
}
